Intex Hose Conversion Adapters Kit for adaptions of Larger 2000 & 2500 gph filter pump system to 16' diameter or smaller Intex pool set Set of two(2) conversion adapters. Required if upgrading from 1000gph or smaller Intex pump system to 2500gph pump system Converting 1-1/4" Intex pool connections to 1-1/2" ID hose with threaded connectors, Compatible to Intex pool filter pump Not recommended for 4000gph pool filter pump, due to the much higher flow-rate.